John Barbour: John Barbour. Writer: The JFK Assassination: The Jim Garrison Tapes. John Barbour was born on 24 April 1933 in Toronto, Ontario, Canada. He is an actor and writer, known for The JFK Assassination: The Jim Garrison Tapes (1992), American Media & The Second Assassination of John F. Kennedy (2017) and CSI: Crime Scene Investigation (2000).